In this article, I will thoroughly compare the Coway Airmega 100 and Xiaomi 4 Lite air purifiers.
Although these two air purifiers are fundamentally different, I believe this comparison will be valuable to potential buyers, especially since both devices got excellent ratings in our tests.
One of the most significant differences between them is their CADR. The Xiaomi 4 Lite has a CADR of 212 CFM (360 m³/h), while the Coway Airmega 100 has a CADR of 109 CFM (185 m³/h).
From this, it’s easy to conclude that the Xiaomi is more than twice as powerful as the Coway.
Additionally, Xiaomi offers a range of advanced features, including smart functionality and compatibility with a mobile app.
Our Verdict
Some may argue that this comparison isn’t entirely fair, primarily because the Xiaomi 4 Lite is a much more powerful air purifier.
However, the Coway Airmega 100 performed impressively in the comparison. It’s more affordable to maintain than the Xiaomi, and its replacement filters are much easier to find.
On the other hand, the Xiaomi 4 Lite outperformed the Coway in all tests. It has a higher CADR, offers plenty of smart features, operates more quietly, and is ultimately the better choice.
If you have any questions about these two air purifiers, feel free to leave a comment below.
Specs: Xiaomi 4 Lite Vs Coway Airmega 100
| Product Image |  |  |
| Manufacturer | Xiaomi | Coway |
| Model | 4 Lite | Airmega 100 |
| Dimensions (inches / cm) | 9.4 x 9.4 x 21 inches (24 × 24 × 53.4 cm) | 8.7 x 8.7 x 15.6 inches (22 x 22 x 39.5 cm) |
| Weight (pounds / kg) | 10.6 lb (4.8 kg) | 6.6 lbs (3.0 kg) |
| Clean Air Delivery Rate (CADR) | 212 CFM (360 m³/h) | 109 CFM (185 m³/h) |
| Coverage (4.8 ACH)
Room Coverage Explanation: ACH is a measurement used in indoor air quality management to indicate how many times the air within a defined space is changed/moved through the filter media.
For more details, visit our ACH calculator tool. | 330 sq. ft. (31 m²) | 169 sq. ft. (15.7 m²) |
| Performance Ratings Performance Ratings Score Summary: 8.4 - Average Score (79 products) 9.8 - Best Score (2 products) 2.5 - Worst Score (2 products) We use the Temtop LKC-1000S laser particle meter to test the particle removal efficiency of every air purifier. It measures PM2.5 (µg/m3), PM10 (µg/m3), Particles (per/L), and HCHO (mg/m3) in the air, and also calculates the AQI. You can read more about our testing methodology here. | ||
| Filtration Technology | Pre-filter, Xiaomi's High Efficiency Filter, and Activated Carbon Filter | Pre-filter, True HEPA Filter, and Deodorization Filter |
| Filter Replacement Indicator | Yes | Yes |
| Filter Life | up to 12 months | up to 12 months |
| Power Consumption
Power Usage Summary: Our extensive testing of 79 air purifiers revealed the following power consumption insights:
Check out our power consumption calculator tool. | 33W | 25W |
| Operating Costs Ratings Operating Costs Ratings Score Summary: 9 - Average Score (79 products) 10 - Best Score (2 products) 1.7 - Worst Score (1 products) We measure the power usage at all speeds using an energy meter, after which we calculate how much it would cost to use the device at a particular fan speed for one month. For reference, we use an energy price of $0.12 per kWh. You can read more about our testing methodology here. | ||
| Number of Fan Speeds | 15 - Through Manual Mode | 4 - Sleep Mode, Speed 1, Speed, and Speed 3 |
| Air Quality Sensor Air Quality Sensor Summary: Out of 79 air purifiers tested, only 39 have the air quality sensor. | Yes | Yes |
| Air Quality Indicator | Yes | Yes |
| Auto Mode Auto Mode Summary: Out of 79 air purifiers tested, only 40 have auto mode functionality. | Yes | Yes |
| Smart App Smart App Summary: Out of 79 air purifiers tested, only 25 have smart app functionality. | Yes | No |
| Voice Control Voice Control Summary: Out of 79 air purifiers tested, only 24 have voice control functionality. | Yes | No |
| Other Features | Humidity & Temperature Sensor | Night LightDisplay LockTimer |
| Noise Level (low – high) | 40.1 - 61.6 dBA | 40.3 – 60.9 dBA |
| Noise Ratings Noise Ratings Score Summary: 9.3 - Average Score (79 products) 10 - Best Score (1 products) 8.2 - Worst Score (1 products) We use a special noise measurement tool to test the noise level of the air purifier at all speeds. We measured the noise level on the dBA scale. You can read more about our testing methodology here. | ||
| Best Suited For | Living Rooms Bedrooms Offices Allergies Dust Smart Home Integration | Bedrooms Small Spaces Dust Allergies Children's Rooms |
| Warranty | 1-year | 3-year |
| In-Depth Review | Xiaomi 4 Lite | Coway Airmega 100 |
| Price | Check Price on Amazon | Check Price on Amazon |
Performance Test – Comparison
Considering that these two models are designed for rooms of different sizes, we tested them in a few rooms of different sizes.
The Coway Airmega 100 is designed for spaces up to 169 sq. ft. (15.7 m²), while the Xiaomi 4 Lite can cover rooms up to 330 sq. ft. (31 m²).
Particle Removal Tests - Comparison
We placed the Coway Airmega 100 and Xiaomi 4 Lite in two separate tests and measured their performance using the Temtop laser particle meter.
I think the most interesting test for this comparison is one in the 320 sq. ft. (30 m²) room.
In this test, the Xiaomi 4 Lite improved air quality by 95%, while the Coway Airmega 100 achieved a 91% improvement.
Both devices operated at maximum speed throughout the 60-minute test.
It is clear that the Xiaomi 4 Lite is the better choice for removing airborne particles, primarily due to its significantly higher CADR compared to the Coway.
Smoke Box Test – Comparison
Honestly, I didn’t expect the Coway to perform this well in the smoke test.
While the Xiaomi 4 Lite cleared all the smoke from the glass box in just 14 seconds, the Coway Airmega 100 took 21 seconds—still a very impressive result.
The Xiaomi 4 Lite uses a pellet-based carbon filter and has a higher CADR, which is the main reason it performed significantly better in this test.
However, I have to commend Coway’s performance, especially considering its much lower CADR and its use of a fibrous filter coated with carbon.
Noise Level Test – Comparison
I’ve mentioned countless times that the Xiaomi 4 Lite is almost unbeatable in a noise test, primarily because it features an impressive 15 fan speeds.
In comparison, the Coway Airmega 100 has only four fan speeds.
At the lowest speed, the Coway Airmega 100 produces 40.3 dBA of noise, while the Xiaomi 4 Lite is slightly quieter at 40.1 dBA.
Noise Level Comparison
Comparing the Coway Airmega 100 and Xiaomi 4 Lite noise levels at minimum and maximum speeds.
At maximum speed, however, the results shift slightly in favor of the Coway, which produces 60.9 dBA compared to the Xiaomi 4 Lite’s 61.6 dBA.
Overall, the Xiaomi 4 Lite is much better optimized for noise control, especially since its 15 fan speeds allow you to adjust the best noise-to-performance ratio.
Operating Costs – Comparison
Not only is the Xiaomi better optimized for noise, but it also has a much more efficient motor when comparing the power-to-CADR ratio.
The Xiaomi 4 Lite uses a 33W motor, while the Coway Airmega 100 operates with a 25W motor.
If both devices were run at maximum speed 24 hours a day for a month, the electricity cost would increase by approximately $3.25 for the Xiaomi 4 Lite and around $1.95 for the Coway Airmega 100.
Power Usage Comparison
Comparing the Coway Airmega 100 Vs Xiaomi 4 Lite power use at minimum and maximum speeds.
Beyond energy costs, there’s also the cost of replacement filters, which last about a year for both devices. However, the Coway’s replacement filters are more affordable and significantly easier to find.
For Xiaomi 4 Lite users, especially those in the US, getting replacement filters could be a challenge.
Considering these factors, I would conclude that the Coway Airmega 100 is slightly more affordable to maintain than the Xiaomi 4 Lite.
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